How to make a 3D house from poster board

My son came home with a project to make a Victorian house for social studies. The teacher gave him the plans on paper. He then had to measure the home on the 8X10 sheet in cm and multiply by 2.5. After he did his measurements we converted them to inches. We then drew the exact same house on the poster board. We cut it out to make sure everything measured correctly. We then painted and decorated it by googling Victorian houses. We found an amazing green colored one which was our inspiration. When finished we hot glued it all together and presto.